well as per experience Belkin-G with MIMO router/access-point works well with a Belkin MIMO adapter, this could be the reason why your PS3 cannot locate the signal. what i'm saying is that when you try to connect to the belkin MIMO router using a regular G adapter, you'll only get the distance and the speed of a regular G device. this also happens if you use a non-belkin MIMO adapter.

it is also possible that there is a wireless interference in between the devices and reorient the devices, you may then check for:

1.2.4 ghz cordless phone (Handset and base station)

2.plaster walls and ceilings

3.a microwave ovenwell as per experience Belkin-G with MIMO router/access-point works well with a Belkin MIMO adapter, this could be the reason why your PS3 cannot locate the signal. what i'm saying is that when you try to connect to the belkin MIMO router using a regular G adapter, you'll only get the distance and the speed of a regular G device. this also happens if you use a non-belkin MIMO adapter.

it is also possible that there is a wireless interference in between the devices and reorient the devices, you may then check for:

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Looks like you are loosing the link , please try to move towards the Wireless transmitting device where it is installed. it will increase the signal strength, if you cant move away, keep your laptop such that its not blocked by cupboards, walls or any big objects

80% is a good signal strength....but if you want to increase the signal strength, then you need to move the wireless router to a very ventilated area, also the router should be placed atleast 5 feet away from other electronic devices like, modem, ups, microwave ovens,refrigerators etc....
also there should be a line of sight between the router and the wi-fi adapter...
but in order to connect to a wireless network 25% of signal strength is enough....

Hi,
As i understand your concern that on your laptop and desktop pc you are getting excellent signals so it might be possible that your third device required to upgrade the drivers for that. Because sometime it happened that the device driver not working properly.

There are a few things that can cause you to lose wireless connection with your wireless router.1. Weak signal strength, check the signal strength on your wireless card. If it is weak move the wireless router away from walls and if possible locate the wireless router higher up.2. Have you secured your wireless router from people near your from unauthorized access? Ie. change the default password, setup encryption use WAP2 or WAP, change the default SSID, and turn off SSID broadcast, and for added protection, enable MAC address filtering which allows only the MAC address/es of your wireless card/s to connect to your wireless router.3. You could be getting interference from electrical sources such as air conditioners, ard welders, washing machines etc. If so the power supply to the wireless routers and computers etc should be connected to a surge protection power board, better still connect your computer equipment to an UPS (Uninterrupted Power Supply) .4. Check the channels of the wireless routers and access points in your area and and change the broadcast channel on your wireless router to an unused channel or one that has the weakest signal strength. This will minimize the interference with your wireless router from the wireless routers and access points in your area.

The lag could be because of a latency between your router and the gaming servers you are connecting to. Not a whole lot you can do about that.
FYI, signal strength of 65-75% isn't bad at all and shouldn't have a significant impact on your wireless performance. Keep in mind that your internet connection is usually the bottleneck for performance. If your wireless runs at 54Mbps with 100% signal strength, when you lose signal, it reduces the performance of your wireless. For example, if you were to get to 40% signal strength, your performance could be reduced to only 11Mbps. While that is a drastic drop for your local LAN performance, 11Mbps is still faster than the vast majority of internet providers currently have, so your in-game performance shouldn't change, based on less signal strength or less bandwidth.
As for your "N" router, if you have a 5Ghz or 2.4Ghz cordless phone in the location where you installed the router, there is a chance that it is conflicting with that frequency. Since you don't have that problem on your "G" router, I can only deduce that if this is the problem, you have a 5Ghz phone, since "G" operates only at 2.4Ghz. If you still have the "N" router, disconnect the phone, re-install the "N" router and see if that fixes your problem. If it does, then you may want to either stick to the "G" router anyway or upgrade your phone to the newer "wireless friendly" 6Ghz phones.

Have you tried updating the firmware of your router? Updating the firmware of the router will fix that issue. Make sure after updating the router's firmware, hard reset the router. To hard reset it, Press the reset button on the back of the router for about 20 seconds, then unplug the power for 30 seconds then plug it back. Reconfigure the wireless settings of the router. Make sure to change the wireless channel of the router to channel 11 or 1 and not 6 to avoid interference.

The fact that it sometimes works and sometimes not, would indicate that maybe your wireless signal strength is poor. Try moving the router and/or antenna and recheck the signal strength.
If you would provide more details about the problem and your setup it may be helpful in diagnosing the problem.